<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <p>123456</p>
    <p>123456</p>
    <p>123456</p>
    <style>
    p{
        color:red;
    }
    p{
        color: #ff0000;
    }
    p{
        color: rgb(112,128,114);
        color: rgba(0, 128, 128, 0.5);
        color: hsl(120, 100%, 30%);
        color: hsla(120, 100%, 30%, 0.5);
    }
    p{
        margin: 0;
        padding: 0;
        background: silver;
        font-size: 15px;
        height: 2em;
    }
    </style>
    <p>2222</p>
    <style>
            p{
                margin: 0;
                padding: 0;
                background: silver;
                font-size: 15px;
                height: 55px;
            }
            p{
                margin: 0;
                padding: 0;
                background: silver;
                font-size: 200%;
                width: 50%;
            }
            
    </style>
</body>
</html>